/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package com.badlogic.gdx.graphics;

import com.badlogic.gdx.Gdx;

/**
 * A simple helper class to log the frames per seconds
 * achieved. Just invoke the {@link #log()} method in
 * your rendering method. The output will be logged
 * once per second.
 * 
 * @author mzechner
 *
 */
public class FPSLogger {
	long startTime;
	
	public FPSLogger() {
		startTime = System.nanoTime();
	}
	
	/**
	 * Logs the current frames per second to the console.
	 */
	public void log() {
		if(System.nanoTime()-startTime>1000000000) {
			Gdx.app.log("FPSLogger", "fps: " + Gdx.graphics.getFramesPerSecond());
			startTime = System.nanoTime();
		}
	}
}
